Short answer: the Wharfedale Diamond 9.1. It ranks #79 of 100 bookshelf speakers by sound quality; the Triangle Borea BR03 ranks #80.
On the Wharfedale Diamond 9.1 side: The first design was a pretty good sounding speaker. Set against that: All current new ones sold today are the crap version.
What the Triangle Borea BR03 gets right: Bass output is genuinely decent for the price - measured extension reaches F3 57Hz/F10 42Hz, which the reviewer had no real complaints about. The catch: A noticeable mid-range suckout, most pronounced in the upper mid-range/lower treble.
Buy the Wharfedale Diamond 9.1 if sound quality matters more than the price. Buy the Triangle Borea BR03 if the price matters more than sound quality.
If sound quality matters at all to you, skip both of these and look higher up the 100 bookshelf speakers instead.

Specifications Side By Side
| Wharfedale Diamond 9.1 | Triangle Borea BR03 | |
|---|---|---|
| Price | Discontinued | $381.77 |
| Ranked | #79 of 100 in Large Size Bookshelf Speakers | #80 of 100 in Large Size Bookshelf Speakers |
| Impedance | 6 ohms | 8 ohms nominal (manufacturer spec), 4.2 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 87dB | 87.5dB (measured at 2.83V/1m, Erin’s Audio Corner) |
| Drivers | 6.5" Kevlar cone woofer, 1" soft dome tweeter | 6.5" natural cellulose midwoofer, 1" (25mm) EFS silk dome tweeter |
| Weight | 12.1 lbs / 5.5 kg (good version), 9.9 lbs / 4.5 kg (bad version) each | 13.22 lbs each |
| Woofer Cabinet | ported | ported, dual front ports |
| Discontinued | Yes | - |
| Dimensions | 11.7"H x 7.6"W x 10.9"D (296.0 x 194.0 x 278.0 mm) | 14.96"H x 8.11"W x 12.36"D |
| High-Pass Filter | - | 3600Hz |
| Bass Extension (-3dB) | - | 57Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | - | 42Hz (measured, Erin’s Audio Corner) |
| Recommended Power | - | 100W |
Related Speaker Comparisons
More useful head-to-heads from the same speaker class:
- Emotiva Airmotiv B2+ vs Klipsch RP-600M
- Klipsch RP-600M vs Yamaha NS-10
- Polk Reserve R100 vs Klipsch RP-600M
- Klipsch RP-600M vs Triangle Borea BR03
- Emotiva Airmotiv B2+ vs Triangle Borea BR03
The Two Speakers In Full
Wharfedale Diamond 9.1: Discontinued
Pros: The first design was a pretty good sounding speaker, the speaker was then outsourced to China and lost 1.5kg and was made with cheap parts and sounds much worse. Slightly rolled off in the treble by about 3dB
Cons: All current new ones sold today are the crap version. Discontinued.
Full Wharfedale Diamond 9.1 review and specifications →
| Dimensions | 11.7"H x 7.6"W x 10.9"D (296.0 x 194.0 x 278.0 mm) |
|---|---|
| Discontinued | Yes |
| Drivers | 6.5" Kevlar cone woofer, 1" soft dome tweeter |
| Impedance | 6 ohms |
| Sensitivity | 87dB |
| Weight | 12.1 lbs / 5.5 kg (good version), 9.9 lbs / 4.5 kg (bad version) each |
| Woofer Cabinet | ported |
As an eBay Partner, we may be compensated if you make a purchase.
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Wharfedale Diamond 9.1 vs Klipsch RP-600M
- Wharfedale Diamond 9.1 vs Sonus Faber Lumina II Amator
- Wharfedale Diamond 9.1 vs B&W 805S
- Wharfedale Diamond 9.1 vs KEF Q350
- Wharfedale Diamond 9.1 vs Aperion Audio Verus V8B
- Wharfedale Diamond 9.1 vs Triad In-Room Gold LCR
- Wharfedale Diamond 9.1 vs Sonus Faber Sonetto II G2
- Wharfedale Diamond 9.1 vs Emotiva Airmotiv B2+
- See all 11 comparisons
Triangle Borea BR03: $381.77 Amazon
Pros: Bass output is genuinely decent for the price - measured extension reaches F3 57Hz/F10 42Hz, which the reviewer had no real complaints about. Dual front-firing ports and a well-stuffed, well-braced cabinet. Solid build quality overall.
Cons: A noticeable mid-range suckout, most pronounced in the upper mid-range/lower treble, that the reviewer attributes to cabinet resonances and driver breakup rather than a deliberate voicing choice - it makes vocals and instruments sound recessed and thin rather than warm. Sibilance in the 4-8kHz region shows up on every track the reviewer tried. Measured minimum impedance dips to about 4.2 ohms (with an even lower EPDR), despite the speaker and its own rear panel being labeled 8 ohms - worth knowing if you’re planning to drive these with a receiver/AVR that assumes an 8-ohm nominal load. The reviewer is upfront that this speaker has a devoted following among other reviewers, but says he specifically doesn’t hear what they hear and wants people who own it to trust their own ears rather than assume something’s wrong with their hearing if they don’t love it either.
Full Triangle Borea BR03 review and specifications →
| Bass Extension (-10dB) | 42Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 57Hz (measured, Erin's Audio Corner) |
| Dimensions | 14.96"H x 8.11"W x 12.36"D |
| Drivers | 6.5" natural cellulose midwoofer, 1" (25mm) EFS silk dome tweeter |
| High-Pass Filter | 3600Hz |
| Impedance | 8 ohms nominal (manufacturer spec), 4.2 ohms minimum (measured, Erin's Audio Corner) |
| Recommended Power | 100W |
| Sensitivity | 87.5dB (measured at 2.83V/1m, Erin's Audio Corner) |
| Weight | 13.22 lbs each |
| Woofer Cabinet | ported, dual front ports |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Triangle Borea BR03 vs B&W 805S
- Triangle Borea BR03 vs Klipsch RP-600M
- Triangle Borea BR03 vs Sonus Faber Lumina II Amator
- Triangle Borea BR03 vs Aperion Audio Verus V8B
- Triangle Borea BR03 vs KEF Q350
- Triangle Borea BR03 vs Sonus Faber Sonetto II G2
- Triangle Borea BR03 vs Emotiva Airmotiv B2+
- Triangle Borea BR03 vs Yamaha NS-10

